Re: [Qemu-devel] [PATCH] vmxnet3: Fix reading/writing guest memory specially when behind an IOMMU

[Jason Wang <jasowang@redhat.com>]

On 2016年06月18日 18:24, KarimAllah Ahmed wrote:
> When a PCI device lives behind an IOMMU, it should use 'pci_dma_*' family of
> functions when any transfer from/to guest memory is required while
> 'cpu_physical_memory_*' family of functions completely bypass any MMU/IOMMU in
> the system.
>
> vmxnet3 was exclusively using 'cpu_physical_memory_*' family of functions which
> works fine with the default QEMU setup where IOMMU is not enabled but fails
> miserably when IOMMU is enabled. This commit converts all such instances in
> favor of 'pci_dma_*'
>
> Cc: Dmitry Fleytman<dmitry@daynix.com>
> Cc: Jason Wang<jasowang@redhat.com>
> Cc:qemu-devel@nongnu.org
> Cc: Anthony Liguori<aliguori@amazon.com>
> Signed-off-by: KarimAllah Ahmed<karahmed@amazon.de>
> ---
>   hw/net/vmware_utils.h  |  55 +++++++------
>   hw/net/vmxnet3.c       | 207 +++++++++++++++++++++++++++----------------------
>   hw/net/vmxnet_tx_pkt.c |  19 ++---
>   hw/net/vmxnet_tx_pkt.h |   8 +-
>   4 files changed, 161 insertions(+), 128 deletions(-)

Thanks for the patch, but could you pls rebase this on top of master?